Tien Ong Cave is located in the Ha Long Bay area, belonging to Cai Tai rocky island. To visit the cave, visitors will have to take a boat on the bay, there will be two options. Option 1, go to Tuan Chau international port to buy tickets to visit the bay and train tickets (the number of ships here is large, with many types of tourism for tourists). Option 2, go to Ha Long international passenger port to buy train tickets and tickets to visit the bay (the port is located near Ha Long Park amusement park, but the number of ships here is less). When buying tickets, you should note that Tien Ong Cave is an attraction only available on sightseeing route 3 of Ha Long Bay.

Most of the caves on Ha Long Bay have the common characteristic that the mouth of the cave is moderate or small, but the cave is very wide, Tien Ong cave has almost the opposite structure, when the mouth of the cave is wide like a cleft cave, only about 50m deep. The cave floor is 4-5m high above sea level and gradually slopes inward. In the middle of the cave, stalactites fall from the top and stalagmites grow from the bottom to form a curtain dividing the cave into two compartments. In the inner compartment, there is a stalactite block, which looks like a man from afar. The fishermen take it and call the cave Tien Ong cave. Tien Ong Cave was opened to visitors in November 2011, located in the tourist route along with Cua Van Floating Cultural Center, Cua Van fishing village, Ba Ham lake.

Tien Ong Cave was discovered by Swedish archaeologist JG Andresson in early 1938 during his journey to survey ancient Vietnamese vestiges along the coast and on the islands of Ha Long Bay and Bai Tu Long. He called this cave Hang Duc (the previous French map called it Grotle du Cieau). Here, he discovered huge sedimentary layers filled with stream snail shells and some rather rudimentary cobblestone tools. Since then, the cave has been marked as an archaeological site on the map of the distribution of sites of the ancient Ha Long people.

Archaeologists of the Vietnam History Museum have excavated some points in Tien Ong cave on November 17, 2007 and the results have obtained a number of stone tools including ceramic fragments, animal bones. on land, stone axe, stone knife. That further proves that Tien Ong cave is one of the residences and living quarters of the ancient Ha Long people, equivalent to the Soi Nhu cave site on Bai Tu Long Bay, belonging to the Hoa Binh - Bac Son culture period.

In 2017, Ha Long Bay Management Board coordinated with Quang Ninh Museum and Vietnam Institute of Archeology to build a display area for archaeological artifacts at the cave. The on-site display has helped visitors not only admire the natural beauty of the cave, but also know through the artifacts a culture that existed in Ha Long thousands of years ago.

Entrance ticket price:

Route 3: Ship Port – Marine Culture Conservation Center. 240,000 VND/1 person

Children under 1.2m or under 7 years old: Free

Elderly people who are Vietnamese citizens from 60 years of age or older (required to present ID card, CCCD or equivalent documents): 50% discount on ticket price

Train ticket price: 150,000 VND / 1 person.